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Step 3.5 Flash Base Midtrain by stepfun-ai

By stepfun-ai · 82 downloads
HF Repo ↗ Copy URL

Step 3.5 Flash Base Midtrain is an open-source language model by stepfun-ai. Features: 197.8b LLM, VRAM: 6GB, License: apache-2.0, LLM Explorer Score: 0.24.

  Arxiv:2601.05593   Arxiv:2602.10604   Conversational   Custom code   Region:us   Safetensors   Step3p5
Model Card on HF 🤗: https://huggingface.co/stepfun-ai/Step-3.5-Flash-Base-Midtrain 

Step 3.5 Flash Base Midtrain Parameters and Internals

LLM NameStep 3.5 Flash Base Midtrain
Repository 🤗https://huggingface.co/stepfun-ai/Step-3.5-Flash-Base-Midtrain 
Model Size197.8b
Required VRAM6 GB
Updated2026-08-08
Maintainerstepfun-ai
Model Typestep3p5
Model Files  9.9 GB   8.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   9.1 GB   6.0 GB
Model ArchitectureStep3p5ForCausalLM
Licenseapache-2.0
Vocabulary Size128896
Torch Data Typebfloat16

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Note: green Score (e.g. "73.2") means that the model is better than stepfun-ai/Step-3.5-Flash-Base-Midtrain.